git.hungrycats.org Git - xscreensaver/blob - hacks/glx/pipes.c

   1 /* -*- Mode: C; tab-width: 4 -*- */
   2 /* pipes --- 3D selfbuiding pipe system */
   3
   4 #if 0
   5 static const char sccsid[] = "@(#)pipes.c       4.07 97/11/24 xlockmore";
   6 #endif
   7
   8 /*-
   9  * Permission to use, copy, modify, and distribute this software and its
  10  * documentation for any purpose and without fee is hereby granted,
  11  * provided that the above copyright notice appear in all copies and that
  12  * both that copyright notice and this permission notice appear in
  13  * supporting documentation.
  14  *
  15  * This file is provided AS IS with no warranties of any kind.  The author
  16  * shall have no liability with respect to the infringement of copyrights,
  17  * trade secrets or any patents by this file or any part thereof.  In no
  18  * event will the author be liable for any lost revenue or profits or
  19  * other special, indirect and consequential damages.
  20  *
  21  * This program was inspired on a WindowsNT(R)'s screen saver. It was written
  22  * from scratch and it was not based on any other source code.
  23  *
  24  * ==========================================================================
  25  * The routine myElbow is derivated from the doughnut routine from the MesaGL
  26  * library (more especifically the Mesaaux library) written by Brian Paul.
  27  * ==========================================================================
  28  *
  29  * Thanks goes to Brian Paul for making it possible and inexpensive to use
  30  * OpenGL at home.
  31  *
  32  * Since I'm not a native English speaker, my apologies for any grammatical
  33  * mistake.
  34  *
  35  * My e-mail address is
  36  * m-vianna@usa.net
  37  * Marcelo F. Vianna (Apr-09-1997)
  38  *
  39  * Revision History:
  40  * 29-Apr-97: Factory equipment by Ed Mackey.  Productive day today, eh?
  41  * 29-Apr-97: Less tight turns Jeff Epler <jepler@inetnebr.com>
  42  * 29-Apr-97: Efficiency speed-ups by Marcelo F. Vianna
  43  */
  44
  45 #ifdef STANDALONE
  46 # define DEFAULTS       "*delay:                10000   \n"                     \
  47                                         "*count:                2       \n"                     \
  48                                         "*cycles:               5       \n"                     \
  49                                         "*size:                 500     \n"                     \
  50                         "*showFPS:      False   \n"                 \
  51                         "*fpsSolid:     True    \n"
  52
  53 # define refresh_pipes 0
  54 # define pipes_handle_event 0
  55 # include "xlockmore.h"                         /* from the xscreensaver distribution */
  56 #else  /* !STANDALONE */
  57 # include "xlock.h"                                     /* from the xlockmore distribution */
  58 #endif /* !STANDALONE */
  59
  60 #ifdef USE_GL
  61
  62 #include "buildlwo.h"
  63 #include "teapot.h"
  64
  65 #define DEF_FACTORY     "2"
  66 #define DEF_FISHEYE     "True"
  67 #define DEF_TIGHTTURNS  "False"
  68 #define DEF_ROTATEPIPES "True"
  69 #define DEF_DBUF        "False"
  70 #define NofSysTypes     3
  71
  72 static int  factory;
  73 static Bool fisheye, tightturns, rotatepipes;
  74 static Bool dbuf_p;
  75
  76 static XrmOptionDescRec opts[] =
  77 {
  78         {"-factory", ".pipes.factory", XrmoptionSepArg, 0},
  79         {"-fisheye", ".pipes.fisheye", XrmoptionNoArg, "on"},
  80         {"+fisheye", ".pipes.fisheye", XrmoptionNoArg, "off"},
  81         {"-tightturns", ".pipes.tightturns", XrmoptionNoArg, "on"},
  82         {"+tightturns", ".pipes.tightturns", XrmoptionNoArg, "off"},
  83       {"-rotatepipes", ".pipes.rotatepipes", XrmoptionNoArg, "on"},
  84       {"+rotatepipes", ".pipes.rotatepipes", XrmoptionNoArg, "off"},
  85       {"-db", ".pipes.doubleBuffer", XrmoptionNoArg, "on"},
  86       {"+db", ".pipes.doubleBuffer", XrmoptionNoArg, "off"},
  87 };
  88 static argtype vars[] =
  89 {
  90         {&factory, "factory", "Factory", DEF_FACTORY, t_Int},
  91         {&fisheye, "fisheye", "Fisheye", DEF_FISHEYE, t_Bool},
  92         {&tightturns, "tightturns", "Tightturns", DEF_TIGHTTURNS, t_Bool},
  93         {&rotatepipes, "rotatepipes", "Rotatepipes", DEF_ROTATEPIPES, t_Bool},
  94         {&dbuf_p, "doubleBuffer", "DoubleBuffer", DEF_DBUF, t_Bool}
  95 };
  96 static OptionStruct desc[] =
  97 {
  98         {"-factory num", "how much extra equipment in pipes (0 for none)"},
  99         {"-/+fisheye", "turn on/off zoomed-in view of pipes"},
 100         {"-/+tightturns", "turn on/off tight turns"},
 101         {"-/+rotatepipes", "turn on/off pipe system rotation per screenful"},
 102         {"-/+db", "turn on/off double buffering"}
 103 };
 104
 105 ENTRYPOINT ModeSpecOpt pipes_opts =
 106 {sizeof opts / sizeof opts[0], opts, sizeof vars / sizeof vars[0], vars, desc};
 107
 108 #ifdef USE_MODULES
 109 ModStruct   pipes_description =
 110 {"pipes", "init_pipes", "draw_pipes", "release_pipes",
 111  "draw_pipes",
 112  "change_pipes", NULL, &pipes_opts,
 113  1000, 2, 5, 500, 4, 1.0, "",
 114  "Shows a selfbuilding pipe system", 0, NULL};
 115
 116 #endif
 117
 118 #define Scale4Window               0.1
 119 #define Scale4Iconic               0.07
 120
 121 #define one_third                  0.3333333333333333333
 122
 123 #define dirNone -1
 124 #define dirUP 0
 125 #define dirDOWN 1
 126 #define dirLEFT 2
 127 #define dirRIGHT 3
 128 #define dirNEAR 4
 129 #define dirFAR 5
 130
 131 #define HCELLS 33
 132 #define VCELLS 25
 133 #define DEFINEDCOLORS 7
 134 #define elbowradius 0.5
 135
 136 /*************************************************************************/
 137
 138 typedef struct {
 139         int         flip;
 140
 141         GLint       WindH, WindW;
 142         int         Cells[HCELLS][VCELLS][HCELLS];
 143         int         usedcolors[DEFINEDCOLORS];
 144         int         directions[6];
 145         int         ndirections;
 146         int         nowdir, olddir;
 147         int         system_number;
 148         int         counter;
 149         int         PX, PY, PZ;
 150         int         number_of_systems;
 151         int         system_type;
 152         int         system_length;
 153         int         turncounter;
 154         Window      window;
 155         const float *system_color;
 156         GLfloat     initial_rotation;
 157         GLuint      valve, bolts, betweenbolts, elbowbolts, elbowcoins;
 158         GLuint      guagehead, guageface, guagedial, guageconnector, teapot;
 159     int         teapot_polys;
 160     int         reset;
 161         GLXContext *glx_context;
 162 } pipesstruct;
 163
 164 extern struct lwo LWO_BigValve, LWO_PipeBetweenBolts, LWO_Bolts3D;
 165 extern struct lwo LWO_GuageHead, LWO_GuageFace, LWO_GuageDial, LWO_GuageConnector;
 166 extern struct lwo LWO_ElbowBolts, LWO_ElbowCoins;
 167
 168 static const float front_shininess[] = {60.0};
 169 static const float front_specular[] = {0.7, 0.7, 0.7, 1.0};
 170 static const float ambient0[] = {0.4, 0.4, 0.4, 1.0};
 171 static const float diffuse0[] = {1.0, 1.0, 1.0, 1.0};
 172 static const float ambient1[] = {0.2, 0.2, 0.2, 1.0};
 173 static const float diffuse1[] = {0.5, 0.5, 0.5, 1.0};
 174 static const float position0[] = {1.0, 1.0, 1.0, 0.0};
 175 static const float position1[] = {-1.0, -1.0, 1.0, 0.0};
 176 static const float lmodel_ambient[] = {0.5, 0.5, 0.5, 1.0};
 177 static const float lmodel_twoside[] = {GL_TRUE};
 178
 179 static const float MaterialRed[] = {0.7, 0.0, 0.0, 1.0};
 180 static const float MaterialGreen[] = {0.1, 0.5, 0.2, 1.0};
 181 static const float MaterialBlue[] = {0.0, 0.0, 0.7, 1.0};
 182 static const float MaterialCyan[] = {0.2, 0.5, 0.7, 1.0};
 183 static const float MaterialYellow[] = {0.7, 0.7, 0.0, 1.0};
 184 static const float MaterialMagenta[] = {0.6, 0.2, 0.5, 1.0};
 185 static const float MaterialWhite[] = {0.7, 0.7, 0.7, 1.0};
 186 static const float MaterialGray[] = {0.2, 0.2, 0.2, 1.0};
 187
 188 static pipesstruct *pipes = NULL;
 189
 190
 191 static void
 192 MakeTube(ModeInfo *mi, int direction)
 193 {
 194         float       an;
 195         float       SINan_3, COSan_3;
 196
 197         /*dirUP    = 00000000 */
 198         /*dirDOWN  = 00000001 */
 199         /*dirLEFT  = 00000010 */
 200         /*dirRIGHT = 00000011 */
 201         /*dirNEAR  = 00000100 */
 202         /*dirFAR   = 00000101 */
 203
 204         if (!(direction & 4)) {
 205                 glRotatef(90.0, (direction & 2) ? 0.0 : 1.0,
 206                           (direction & 2) ? 1.0 : 0.0, 0.0);
 207         }
 208         glBegin(GL_QUAD_STRIP);
 209         for (an = 0.0; an <= 2.0 * M_PI; an += M_PI / 12.0) {
 210                 glNormal3f((COSan_3 = cos(an) / 3.0), (SINan_3 = sin(an) / 3.0), 0.0);
 211                 glVertex3f(COSan_3, SINan_3, one_third);
 212                 glVertex3f(COSan_3, SINan_3, -one_third);
 213         mi->polygon_count++;
 214         }
 215         glEnd();
 216 }
 217
 218 static void
 219 mySphere(float radius)
 220 {
 221         GLUquadricObj *quadObj;
 222
 223         quadObj = gluNewQuadric();
 224         gluQuadricDrawStyle(quadObj, (GLenum) GLU_FILL);
 225         gluSphere(quadObj, radius, 16, 16);
 226         gluDeleteQuadric(quadObj);
 227 }
 228
 229 static void
 230 myElbow(ModeInfo * mi, int bolted)
 231 {
 232 #define nsides 25
 233 #define rings 25
 234 #define r one_third
 235 #define R one_third
 236
 237         pipesstruct *pp = &pipes[MI_SCREEN(mi)];
 238
 239         int         i, j;
 240         GLfloat     p0[3], p1[3], p2[3], p3[3];
 241         GLfloat     n0[3], n1[3], n2[3], n3[3];
 242         GLfloat     COSphi, COSphi1, COStheta, COStheta1;
 243         GLfloat     _SINtheta, _SINtheta1;
 244
 245         for (i = 0; i <= rings / 4; i++) {
 246                 GLfloat     theta, theta1;
 247
 248                 theta = (GLfloat) i *2.0 * M_PI / rings;
 249
 250                 theta1 = (GLfloat) (i + 1) * 2.0 * M_PI / rings;
 251                 for (j = 0; j < nsides; j++) {
 252                         GLfloat     phi, phi1;
 253
 254                         phi = (GLfloat) j *2.0 * M_PI / nsides;
 255
 256                         phi1 = (GLfloat) (j + 1) * 2.0 * M_PI / nsides;
 257
 258                         p0[0] = (COStheta = cos(theta)) * (R + r * (COSphi = cos(phi)));
 259                         p0[1] = (_SINtheta = -sin(theta)) * (R + r * COSphi);
 260
 261                         p1[0] = (COStheta1 = cos(theta1)) * (R + r * COSphi);
 262                         p1[1] = (_SINtheta1 = -sin(theta1)) * (R + r * COSphi);
 263
 264                         p2[0] = COStheta1 * (R + r * (COSphi1 = cos(phi1)));
 265                         p2[1] = _SINtheta1 * (R + r * COSphi1);
 266
 267                         p3[0] = COStheta * (R + r * COSphi1);
 268                         p3[1] = _SINtheta * (R + r * COSphi1);
 269
 270                         n0[0] = COStheta * COSphi;
 271                         n0[1] = _SINtheta * COSphi;
 272
 273                         n1[0] = COStheta1 * COSphi;
 274                         n1[1] = _SINtheta1 * COSphi;
 275
 276                         n2[0] = COStheta1 * COSphi1;
 277                         n2[1] = _SINtheta1 * COSphi1;
 278
 279                         n3[0] = COStheta * COSphi1;
 280                         n3[1] = _SINtheta * COSphi1;
 281
 282                         p0[2] = p1[2] = r * (n0[2] = n1[2] = sin(phi));
 283                         p2[2] = p3[2] = r * (n2[2] = n3[2] = sin(phi1));
 284
 285                         glBegin(GL_QUADS);
 286                         glNormal3fv(n3);
 287                         glVertex3fv(p3);
 288                         glNormal3fv(n2);
 289                         glVertex3fv(p2);
 290                         glNormal3fv(n1);
 291                         glVertex3fv(p1);
 292                         glNormal3fv(n0);
 293                         glVertex3fv(p0);
 294             mi->polygon_count++;
 295                         glEnd();
 296                 }
 297         }
 298
 299         if (factory > 0 && bolted) {
 300                 /* Bolt the elbow onto the pipe system */
 301                 glFrontFace(GL_CW);
 302                 glPushMatrix();
 303                 glRotatef(90.0, 0.0, 0.0, -1.0);
 304                 glRotatef(90.0, 0.0, 1.0, 0.0);
 305                 glTranslatef(0.0, one_third, one_third);
 306                 glCallList(pp->elbowcoins);
 307         mi->polygon_count += LWO_ElbowCoins.num_pnts/3;
 308                 glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialGray);
 309                 glCallList(pp->elbowbolts);
 310         mi->polygon_count += LWO_ElbowBolts.num_pnts/3;
 311                 glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, pp->system_color);
 312                 glPopMatrix();
 313                 glFrontFace(GL_CCW);
 314         }
 315 #undef r
 316 #undef R
 317 #undef nsides
 318 #undef rings
 319 }
 320
 321 static void
 322 FindNeighbors(ModeInfo * mi)
 323 {
 324         pipesstruct *pp = &pipes[MI_SCREEN(mi)];
 325
 326         pp->ndirections = 0;
 327         pp->directions[dirUP] = (!pp->Cells[pp->PX][pp->PY + 1][pp->PZ]) ? 1 : 0;
 328         pp->ndirections += pp->directions[dirUP];
 329         pp->directions[dirDOWN] = (!pp->Cells[pp->PX][pp->PY - 1][pp->PZ]) ? 1 : 0;
 330         pp->ndirections += pp->directions[dirDOWN];
 331         pp->directions[dirLEFT] = (!pp->Cells[pp->PX - 1][pp->PY][pp->PZ]) ? 1 : 0;
 332         pp->ndirections += pp->directions[dirLEFT];
 333         pp->directions[dirRIGHT] = (!pp->Cells[pp->PX + 1][pp->PY][pp->PZ]) ? 1 : 0;
 334         pp->ndirections += pp->directions[dirRIGHT];
 335         pp->directions[dirFAR] = (!pp->Cells[pp->PX][pp->PY][pp->PZ - 1]) ? 1 : 0;
 336         pp->ndirections += pp->directions[dirFAR];
 337         pp->directions[dirNEAR] = (!pp->Cells[pp->PX][pp->PY][pp->PZ + 1]) ? 1 : 0;
 338         pp->ndirections += pp->directions[dirNEAR];
 339 }
 340
 341 static int
 342 SelectNeighbor(ModeInfo * mi)
 343 {
 344         pipesstruct *pp = &pipes[MI_SCREEN(mi)];
 345         int         dirlist[6];
 346         int         i, j;
 347
 348         for (i = 0, j = 0; i < 6; i++) {
 349                 if (pp->directions[i]) {
 350                         dirlist[j] = i;
 351                         j++;
 352                 }
 353         }
 354
 355         return dirlist[NRAND(pp->ndirections)];
 356 }
 357
 358 static void
 359 MakeValve(ModeInfo * mi, int newdir)
 360 {
 361         pipesstruct *pp = &pipes[MI_SCREEN(mi)];
 362
 363         /* There is a glPopMatrix() right after this subroutine returns. */
 364         switch (newdir) {
 365                 case dirUP:
 366                 case dirDOWN:
 367                         glRotatef(90.0, 1.0, 0.0, 0.0);
 368                         glRotatef(NRAND(3) * 90.0, 0.0, 0.0, 1.0);
 369                         break;
 370                 case dirLEFT:
 371                 case dirRIGHT:
 372                         glRotatef(90.0, 0.0, -1.0, 0.0);
 373                         glRotatef((NRAND(3) * 90.0) - 90.0, 0.0, 0.0, 1.0);
 374                         break;
 375                 case dirNEAR:
 376                 case dirFAR:
 377                         glRotatef(NRAND(4) * 90.0, 0.0, 0.0, 1.0);
 378                         break;
 379         }
 380         glFrontFace(GL_CW);
 381         glCallList(pp->betweenbolts);
 382     mi->polygon_count += LWO_PipeBetweenBolts.num_pnts/3;
 383         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialGray);
 384         glCallList(pp->bolts);
 385     mi->polygon_count += LWO_Bolts3D.num_pnts/3;
 386         if (!MI_IS_MONO(mi)) {
 387                 if (pp->system_color == MaterialRed) {
 388                         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, NRAND(2) ? MaterialYellow : MaterialBlue);
 389                 } else if (pp->system_color == MaterialBlue) {
 390                         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, NRAND(2) ? MaterialRed : MaterialYellow);
 391                 } else if (pp->system_color == MaterialYellow) {
 392                         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, NRAND(2) ? MaterialBlue : MaterialRed);
 393                 } else {
 394                         switch ((NRAND(3))) {
 395                                 case 0:
 396                                         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialRed);
 397                                         break;
 398                                 case 1:
 399                                         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialBlue);
 400                                         break;
 401                                 case 2:
 402                                         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialYellow);
 403                         }
 404                 }
 405         }
 406         glRotatef((GLfloat) (NRAND(90)), 1.0, 0.0, 0.0);
 407         glCallList(pp->valve);
 408     mi->polygon_count += LWO_BigValve.num_pnts/3;
 409         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, pp->system_color);
 410         glFrontFace(GL_CCW);
 411 }
 412
 413 static int
 414 MakeGuage(ModeInfo * mi, int newdir)
 415 {
 416         pipesstruct *pp = &pipes[MI_SCREEN(mi)];
 417
 418         /* Can't have a guage on a vertical pipe. */
 419         if ((newdir == dirUP) || (newdir == dirDOWN))
 420                 return (0);
 421
 422         /* Is there space above this pipe for a guage? */
 423         if (!pp->directions[dirUP])
 424                 return (0);
 425
 426         /* Yes!  Mark the space as used. */
 427         pp->Cells[pp->PX][pp->PY + 1][pp->PZ] = 1;
 428
 429         glFrontFace(GL_CW);
 430         glPushMatrix();
 431         if ((newdir == dirLEFT) || (newdir == dirRIGHT))
 432                 glRotatef(90.0, 0.0, 1.0, 0.0);
 433         glCallList(pp->betweenbolts);
 434     mi->polygon_count += LWO_PipeBetweenBolts.num_pnts/3;
 435         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialGray);
 436         glCallList(pp->bolts);
 437     mi->polygon_count += LWO_Bolts3D.num_pnts/3;
 438         glPopMatrix();
 439
 440         glCallList(pp->guageconnector);
 441     mi->polygon_count += LWO_GuageConnector.num_pnts/3;
 442         glPushMatrix();
 443         glTranslatef(0.0, 1.33333, 0.0);
 444         /* Do not change the above to 1 + ONE_THIRD, because */
 445         /* the object really is centered on 1.3333300000. */
 446         glRotatef(NRAND(270) + 45.0, 0.0, 0.0, -1.0);
 447         /* Random rotation for the dial.  I love it. */
 448         glCallList(pp->guagedial);
 449     mi->polygon_count += LWO_GuageDial.num_pnts/3;
 450         glPopMatrix();
 451
 452         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, pp->system_color);
 453         glCallList(pp->guagehead);
 454     mi->polygon_count += LWO_GuageHead.num_pnts/3;
 455
 456         /* GuageFace is drawn last, in case of low-res depth buffers. */
 457         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialWhite);
 458         glCallList(pp->guageface);
 459     mi->polygon_count += LWO_GuageFace.num_pnts/3;
 460
 461         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, pp->system_color);
 462         glFrontFace(GL_CCW);
 463
 464         return (1);
 465 }
 466
 467
 468 static GLuint
 469 build_teapot(ModeInfo *mi)
 470 {
 471   pipesstruct *pp = &pipes[MI_SCREEN(mi)];
 472   GLuint list = glGenLists(1);
 473   if (!list) return 0;
 474   glNewList(list, GL_COMPILE);
 475   pp->teapot_polys = unit_teapot (12, MI_IS_WIREFRAME(mi));
 476   glEndList();
 477   return list;
 478 }
 479
 480
 481 static void
 482 MakeTeapot(ModeInfo * mi, int newdir)
 483 {
 484   pipesstruct *pp = &pipes[MI_SCREEN(mi)];
 485
 486   switch (newdir) {
 487   case dirUP:
 488   case dirDOWN:
 489     glRotatef(90.0, 1.0, 0.0, 0.0);
 490     glRotatef(NRAND(3) * 90.0, 0.0, 0.0, 1.0);
 491     break;
 492   case dirLEFT:
 493   case dirRIGHT:
 494     glRotatef(90.0, 0.0, -1.0, 0.0);
 495     glRotatef((NRAND(3) * 90.0) - 90.0, 0.0, 0.0, 1.0);
 496     break;
 497   case dirNEAR:
 498   case dirFAR:
 499     glRotatef(NRAND(4) * 90.0, 0.0, 0.0, 1.0);
 500     break;
 501   }
 502
 503   glCallList(pp->teapot);
 504   mi->polygon_count += pp->teapot_polys;
 505   glFrontFace(GL_CCW);
 506 }
 507
 508
 509 static void
 510 MakeShape(ModeInfo * mi, int newdir)
 511 {
 512   int n = NRAND(100);
 513   if (n < 50) {
 514     if (!MakeGuage(mi, newdir))
 515       MakeTube(mi, newdir);
 516   } else if (n < 98) {
 517     MakeValve(mi, newdir);
 518   } else {
 519     MakeTeapot(mi,newdir);
 520   }
 521 }
 522
 523 static void
 524 pinit(ModeInfo * mi, int zera)
 525 {
 526         pipesstruct *pp = &pipes[MI_SCREEN(mi)];
 527         int         X, Y, Z;
 528
 529     if (zera)
 530       mi->polygon_count = 0;
 531
 532         glClearDepth(1.0);
 533         glColor3f(1.0, 1.0, 1.0);
 534
 535         glLightfv(GL_LIGHT0, GL_AMBIENT, ambient0);
 536         glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse0);
 537         glLightfv(GL_LIGHT0, GL_POSITION, position0);
 538         glLightfv(GL_LIGHT1, GL_AMBIENT, ambient1);
 539         glLightfv(GL_LIGHT1, GL_DIFFUSE, diffuse1);
 540         glLightfv(GL_LIGHT1, GL_POSITION, position1);
 541         glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
 542         glLightModelfv(GL_LIGHT_MODEL_TWO_SIDE, lmodel_twoside);
 543         glEnable(GL_LIGHTING);
 544         glEnable(GL_LIGHT0);
 545         glEnable(GL_LIGHT1);
 546         glEnable(GL_DEPTH_TEST);
 547         glEnable(GL_NORMALIZE);
 548         glEnable(GL_CULL_FACE);
 549
 550         glShadeModel(GL_SMOOTH);
 551         glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, front_shininess);
 552         glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, front_specular);
 553
 554         if (zera) {
 555                 pp->system_number = 1;
 556                 glDrawBuffer(dbuf_p ? GL_BACK : GL_FRONT);
 557                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 558                 (void) memset(pp->Cells, 0, sizeof (pp->Cells));
 559                 for (X = 0; X < HCELLS; X++) {
 560                         for (Y = 0; Y < VCELLS; Y++) {
 561                                 pp->Cells[X][Y][0] = 1;
 562                                 pp->Cells[X][Y][HCELLS - 1] = 1;
 563                                 pp->Cells[0][Y][X] = 1;
 564                                 pp->Cells[HCELLS - 1][Y][X] = 1;
 565                         }
 566                 }
 567                 for (X = 0; X < HCELLS; X++) {
 568                         for (Z = 0; Z < HCELLS; Z++) {
 569                                 pp->Cells[X][0][Z] = 1;
 570                                 pp->Cells[X][VCELLS - 1][Z] = 1;
 571                         }
 572                 }
 573                 (void) memset(pp->usedcolors, 0, sizeof (pp->usedcolors));
 574                 if ((pp->initial_rotation += 10.0) > 45.0) {
 575                         pp->initial_rotation -= 90.0;
 576                 }
 577         }
 578         pp->counter = 0;
 579         pp->turncounter = 0;
 580
 581         if (!MI_IS_MONO(mi)) {
 582                 int         collist[DEFINEDCOLORS];
 583                 int         i, j, lower = 1000;
 584
 585                 /* Avoid repeating colors on the same screen unless necessary */
 586                 for (i = 0; i < DEFINEDCOLORS; i++) {
 587                         if (lower > pp->usedcolors[i])
 588                                 lower = pp->usedcolors[i];
 589                 }
 590                 for (i = 0, j = 0; i < DEFINEDCOLORS; i++) {
 591                         if (pp->usedcolors[i] == lower) {
 592                                 collist[j] = i;
 593                                 j++;
 594                         }
 595                 }
 596                 i = collist[NRAND(j)];
 597                 pp->usedcolors[i]++;
 598                 switch (i) {
 599                         case 0:
 600                                 pp->system_color = MaterialRed;
 601                                 break;
 602                         case 1:
 603                                 pp->system_color = MaterialGreen;
 604                                 break;
 605                         case 2:
 606                                 pp->system_color = MaterialBlue;
 607                                 break;
 608                         case 3:
 609                                 pp->system_color = MaterialCyan;
 610                                 break;
 611                         case 4:
 612                                 pp->system_color = MaterialYellow;
 613                                 break;
 614                         case 5:
 615                                 pp->system_color = MaterialMagenta;
 616                                 break;
 617                         case 6:
 618                                 pp->system_color = MaterialWhite;
 619                                 break;
 620                 }
 621         } else {
 622                 pp->system_color = MaterialGray;
 623         }
 624
 625         do {
 626                 pp->PX = NRAND((HCELLS - 1)) + 1;
 627                 pp->PY = NRAND((VCELLS - 1)) + 1;
 628                 pp->PZ = NRAND((HCELLS - 1)) + 1;
 629         } while (pp->Cells[pp->PX][pp->PY][pp->PZ] ||
 630                  (pp->Cells[pp->PX + 1][pp->PY][pp->PZ] && pp->Cells[pp->PX - 1][pp->PY][pp->PZ] &&
 631                   pp->Cells[pp->PX][pp->PY + 1][pp->PZ] && pp->Cells[pp->PX][pp->PY - 1][pp->PZ] &&
 632                   pp->Cells[pp->PX][pp->PY][pp->PZ + 1] && pp->Cells[pp->PX][pp->PY][pp->PZ - 1]));
 633         pp->Cells[pp->PX][pp->PY][pp->PZ] = 1;
 634         pp->olddir = dirNone;
 635
 636         FindNeighbors(mi);
 637
 638         pp->nowdir = SelectNeighbor(mi);
 639 }
 640
 641 ENTRYPOINT void
 642 reshape_pipes(ModeInfo * mi, int width, int height)
 643 {
 644         pipesstruct *pp = &pipes[MI_SCREEN(mi)];
 645     pinit(mi, 1);
 646
 647         glViewport(0, 0, pp->WindW = (GLint) width, pp->WindH = (GLint) height);
 648         glMatrixMode(GL_PROJECTION);
 649         glLoadIdentity();
 650         /*glFrustum(-1.0, 1.0, -1.0, 1.0, 5.0, 15.0); */
 651         gluPerspective(65.0, (GLfloat) width / (GLfloat) height, 0.1, 20.0);
 652         glMatrixMode(GL_MODELVIEW);
 653
 654   glClear(GL_COLOR_BUFFER_BIT);
 655 }
 656
 657 ENTRYPOINT void
 658 init_pipes (ModeInfo * mi)
 659 {
 660         int         screen = MI_SCREEN(mi);
 661         pipesstruct *pp;
 662
 663         if (pipes == NULL) {
 664                 if ((pipes = (pipesstruct *) calloc(MI_NUM_SCREENS(mi),
 665                                               sizeof (pipesstruct))) == NULL)
 666                         return;
 667         }
 668         pp = &pipes[screen];
 669
 670         pp->window = MI_WINDOW(mi);
 671         if ((pp->glx_context = init_GL(mi)) != NULL) {
 672
 673                 reshape_pipes(mi, MI_WIDTH(mi), MI_HEIGHT(mi));
 674                 if (rotatepipes)
 675                   pp->initial_rotation = NRAND(180); /* jwz */
 676                 else
 677                   pp->initial_rotation = -10.0;
 678                 pinit(mi, 1);
 679
 680                 if (factory > 0) {
 681                         pp->valve = BuildLWO(MI_IS_WIREFRAME(mi), &LWO_BigValve);
 682                         pp->bolts = BuildLWO(MI_IS_WIREFRAME(mi), &LWO_Bolts3D);
 683                         pp->betweenbolts = BuildLWO(MI_IS_WIREFRAME(mi), &LWO_PipeBetweenBolts);
 684
 685                         pp->elbowbolts = BuildLWO(MI_IS_WIREFRAME(mi), &LWO_ElbowBolts);
 686                         pp->elbowcoins = BuildLWO(MI_IS_WIREFRAME(mi), &LWO_ElbowCoins);
 687
 688                         pp->guagehead = BuildLWO(MI_IS_WIREFRAME(mi), &LWO_GuageHead);
 689                         pp->guageface = BuildLWO(MI_IS_WIREFRAME(mi), &LWO_GuageFace);
 690                         pp->guagedial = BuildLWO(MI_IS_WIREFRAME(mi), &LWO_GuageDial);
 691                         pp->guageconnector = BuildLWO(MI_IS_WIREFRAME(mi), &LWO_GuageConnector);
 692                         pp->teapot = build_teapot(mi);
 693                 }
 694                 /* else they are all 0, thanks to calloc(). */
 695
 696                 if (MI_COUNT(mi) < 1 || MI_COUNT(mi) > NofSysTypes + 1) {
 697                         pp->system_type = NRAND(NofSysTypes) + 1;
 698                 } else {
 699                         pp->system_type = MI_COUNT(mi);
 700                 }
 701
 702                 if (MI_CYCLES(mi) > 0 && MI_CYCLES(mi) < 11) {
 703                         pp->number_of_systems = MI_CYCLES(mi);
 704                 } else {
 705                         pp->number_of_systems = 5;
 706                 }
 707
 708                 if (MI_SIZE(mi) < 10) {
 709                         pp->system_length = 10;
 710                 } else if (MI_SIZE(mi) > 1000) {
 711                         pp->system_length = 1000;
 712                 } else {
 713                         pp->system_length = MI_SIZE(mi);
 714                 }
 715         } else {
 716                 MI_CLEARWINDOW(mi);
 717         }
 718 }
 719
 720 ENTRYPOINT void
 721 draw_pipes (ModeInfo * mi)
 722 {
 723         pipesstruct *pp = &pipes[MI_SCREEN(mi)];
 724
 725         Display    *display = MI_DISPLAY(mi);
 726         Window      window = MI_WINDOW(mi);
 727
 728         int         newdir;
 729         int         OPX, OPY, OPZ;
 730
 731         if (!pp->glx_context)
 732                 return;
 733
 734         glXMakeCurrent(MI_DISPLAY(mi), MI_WINDOW(mi), *(pp->glx_context));
 735
 736     if (pp->reset) {
 737       if (--pp->reset) {
 738         /* Would be nice to fade to black here, by drawing successive quads
 739            over the whole scene with gamma. */
 740         return;
 741       }
 742       pinit(mi, 1);
 743     }
 744
 745         glPushMatrix();
 746
 747         glTranslatef(0.0, 0.0, fisheye ? -3.8 : -4.8);
 748         if (rotatepipes)
 749                 glRotatef(pp->initial_rotation, 0.0, 1.0, 0.0);
 750
 751         if (!MI_IS_ICONIC(mi)) {
 752                 /* Width/height ratio handled by gluPerspective() now. */
 753                 glScalef(Scale4Window, Scale4Window, Scale4Window);
 754         } else {
 755                 glScalef(Scale4Iconic, Scale4Iconic, Scale4Iconic);
 756         }
 757
 758         FindNeighbors(mi);
 759
 760         glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, pp->system_color);
 761
 762         /* If it's the begining of a system, draw a sphere */
 763         if (pp->olddir == dirNone) {
 764                 glPushMatrix();
 765                 glTranslatef((pp->PX - 16) / 3.0 * 4.0, (pp->PY - 12) / 3.0 * 4.0, (pp->PZ - 16) / 3.0 * 4.0);
 766                 mySphere(0.6);
 767                 glPopMatrix();
 768         }
 769         /* Check for stop conditions */
 770         if (pp->ndirections == 0 || pp->counter > pp->system_length) {
 771                 glPushMatrix();
 772                 glTranslatef((pp->PX - 16) / 3.0 * 4.0, (pp->PY - 12) / 3.0 * 4.0, (pp->PZ - 16) / 3.0 * 4.0);
 773                 /* Finish the system with another sphere */
 774                 mySphere(0.6);
 775
 776                 glPopMatrix();
 777
 778                 /* If the maximum number of system was drawn, restart (clearing the screen), */
 779                 /* else start a new system. */
 780                 if (++pp->system_number > pp->number_of_systems) {
 781           /* pause doing nothing for N seconds before clearing the screen. */
 782           int secs = 3;
 783           pp->reset = secs * 1000000 / (MI_PAUSE(mi) ? MI_PAUSE(mi) : 100);
 784                 } else {
 785                         pinit(mi, 0);
 786                 }
 787
 788                 glPopMatrix();
 789                 return;
 790         }
 791         pp->counter++;
 792         pp->turncounter++;
 793
 794         /* Do will the direction change? if so, determine the new one */
 795         newdir = pp->nowdir;
 796         if (!pp->directions[newdir]) {  /* cannot proceed in the current direction */
 797                 newdir = SelectNeighbor(mi);
 798         } else {
 799                 if (tightturns) {
 800                         /* random change (20% chance) */
 801                         if ((pp->counter > 1) && (NRAND(100) < 20)) {
 802                                 newdir = SelectNeighbor(mi);
 803                         }
 804                 } else {
 805                         /* Chance to turn increases after each length of pipe drawn */
 806                         if ((pp->counter > 1) && NRAND(50) < NRAND(pp->turncounter + 1)) {
 807                                 newdir = SelectNeighbor(mi);
 808                                 pp->turncounter = 0;
 809                         }
 810                 }
 811         }
 812
 813         /* Has the direction changed? */
 814         if (newdir == pp->nowdir) {
 815                 /* If not, draw the cell's center pipe */
 816                 glPushMatrix();
 817                 glTranslatef((pp->PX - 16) / 3.0 * 4.0, (pp->PY - 12) / 3.0 * 4.0, (pp->PZ - 16) / 3.0 * 4.0);
 818                 /* Chance of factory shape here, if enabled. */
 819                 if ((pp->counter > 1) && (NRAND(100) < factory)) {
 820                         MakeShape(mi, newdir);
 821                 } else {
 822                         MakeTube(mi, newdir);
 823                 }
 824                 glPopMatrix();
 825         } else {
 826                 /* If so, draw the cell's center elbow/sphere */
 827                 int         sysT = pp->system_type;
 828
 829                 if (sysT == NofSysTypes + 1) {
 830                         sysT = ((pp->system_number - 1) % NofSysTypes) + 1;
 831                 }
 832                 glPushMatrix();
 833
 834                 switch (sysT) {
 835                         case 1:
 836                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0, (pp->PY - 12) / 3.0 * 4.0, (pp->PZ - 16) / 3.0 * 4.0);
 837                                 mySphere(elbowradius);
 838                                 break;
 839                         case 2:
 840                         case 3:
 841                                 switch (pp->nowdir) {
 842                                         case dirUP:
 843                                                 switch (newdir) {
 844                                                         case dirLEFT:
 845                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 - (one_third), (pp->PY - 12) / 3.0 * 4.0 - (one_third), (pp->PZ - 16) / 3.0 * 4.0);
 846                                                                 glRotatef(180.0, 1.0, 0.0, 0.0);
 847                                                                 break;
 848                                                         case dirRIGHT:
 849                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 + (one_third), (pp->PY - 12) / 3.0 * 4.0 - (one_third), (pp->PZ - 16) / 3.0 * 4.0);
 850                                                                 glRotatef(180.0, 1.0, 0.0, 0.0);
 851                                                                 glRotatef(180.0, 0.0, 1.0, 0.0);
 852                                                                 break;
 853                                                         case dirFAR:
 854                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0, (pp->PY - 12) / 3.0 * 4.0 - (one_third), (pp->PZ - 16) / 3.0 * 4.0 - (one_third));
 855                                                                 glRotatef(90.0, 0.0, 1.0, 0.0);
 856                                                                 glRotatef(180.0, 0.0, 0.0, 1.0);
 857                                                                 break;
 858                                                         case dirNEAR:
 859                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0, (pp->PY - 12) / 3.0 * 4.0 - (one_third), (pp->PZ - 16) / 3.0 * 4.0 + (one_third));
 860                                                                 glRotatef(90.0, 0.0, 1.0, 0.0);
 861                                                                 glRotatef(180.0, 1.0, 0.0, 0.0);
 862                                                                 break;
 863                                                 }
 864                                                 break;
 865                                         case dirDOWN:
 866                                                 switch (newdir) {
 867                                                         case dirLEFT:
 868                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 - (one_third), (pp->PY - 12) / 3.0 * 4.0 + (one_third), (pp->PZ - 16) / 3.0 * 4.0);
 869                                                                 break;
 870                                                         case dirRIGHT:
 871                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 + (one_third), (pp->PY - 12) / 3.0 * 4.0 + (one_third), (pp->PZ - 16) / 3.0 * 4.0);
 872                                                                 glRotatef(180.0, 0.0, 1.0, 0.0);
 873                                                                 break;
 874                                                         case dirFAR:
 875                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0, (pp->PY - 12) / 3.0 * 4.0 + (one_third), (pp->PZ - 16) / 3.0 * 4.0 - (one_third));
 876                                                                 glRotatef(270.0, 0.0, 1.0, 0.0);
 877                                                                 break;
 878                                                         case dirNEAR:
 879                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0, (pp->PY - 12) / 3.0 * 4.0 + (one_third), (pp->PZ - 16) / 3.0 * 4.0 + (one_third));
 880                                                                 glRotatef(90.0, 0.0, 1.0, 0.0);
 881                                                                 break;
 882                                                 }
 883                                                 break;
 884                                         case dirLEFT:
 885                                                 switch (newdir) {
 886                                                         case dirUP:
 887                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 + (one_third), (pp->PY - 12) / 3.0 * 4.0 + (one_third), (pp->PZ - 16) / 3.0 * 4.0);
 888                                                                 glRotatef(180.0, 0.0, 1.0, 0.0);
 889                                                                 break;
 890                                                         case dirDOWN:
 891                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 + (one_third), (pp->PY - 12) / 3.0 * 4.0 - (one_third), (pp->PZ - 16) / 3.0 * 4.0);
 892                                                                 glRotatef(180.0, 1.0, 0.0, 0.0);
 893                                                                 glRotatef(180.0, 0.0, 1.0, 0.0);
 894                                                                 break;
 895                                                         case dirFAR:
 896                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 + (one_third), (pp->PY - 12) / 3.0 * 4.0, (pp->PZ - 16) / 3.0 * 4.0 - (one_third));
 897                                                                 glRotatef(270.0, 1.0, 0.0, 0.0);
 898                                                                 glRotatef(180.0, 0.0, 1.0, 0.0);
 899                                                                 break;
 900                                                         case dirNEAR:
 901                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 + (one_third), (pp->PY - 12) / 3.0 * 4.0, (pp->PZ - 16) / 3.0 * 4.0 + (one_third));
 902                                                                 glRotatef(270.0, 1.0, 0.0, 0.0);
 903                                                                 glRotatef(180.0, 0.0, 0.0, 1.0);
 904                                                                 break;
 905                                                 }
 906                                                 break;
 907                                         case dirRIGHT:
 908                                                 switch (newdir) {
 909                                                         case dirUP:
 910                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 - (one_third), (pp->PY - 12) / 3.0 * 4.0 + (one_third), (pp->PZ - 16) / 3.0 * 4.0);
 911                                                                 break;
 912                                                         case dirDOWN:
 913                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 - (one_third), (pp->PY - 12) / 3.0 * 4.0 - (one_third), (pp->PZ - 16) / 3.0 * 4.0);
 914                                                                 glRotatef(180.0, 1.0, 0.0, 0.0);
 915                                                                 break;
 916                                                         case dirFAR:
 917                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 - (one_third), (pp->PY - 12) / 3.0 * 4.0, (pp->PZ - 16) / 3.0 * 4.0 - (one_third));
 918                                                                 glRotatef(270.0, 1.0, 0.0, 0.0);
 919                                                                 break;
 920                                                         case dirNEAR:
 921                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 - (one_third), (pp->PY - 12) / 3.0 * 4.0, (pp->PZ - 16) / 3.0 * 4.0 + (one_third));
 922                                                                 glRotatef(90.0, 1.0, 0.0, 0.0);
 923                                                                 break;
 924                                                 }
 925                                                 break;
 926                                         case dirNEAR:
 927                                                 switch (newdir) {
 928                                                         case dirLEFT:
 929                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 - (one_third), (pp->PY - 12) / 3.0 * 4.0, (pp->PZ - 16) / 3.0 * 4.0 - (one_third));
 930                                                                 glRotatef(270.0, 1.0, 0.0, 0.0);
 931                                                                 break;
 932                                                         case dirRIGHT:
 933                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 + (one_third), (pp->PY - 12) / 3.0 * 4.0, (pp->PZ - 16) / 3.0 * 4.0 - (one_third));
 934                                                                 glRotatef(270.0, 1.0, 0.0, 0.0);
 935                                                                 glRotatef(180.0, 0.0, 1.0, 0.0);
 936                                                                 break;
 937                                                         case dirUP:
 938                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0, (pp->PY - 12) / 3.0 * 4.0 + (one_third), (pp->PZ - 16) / 3.0 * 4.0 - (one_third));
 939                                                                 glRotatef(270.0, 0.0, 1.0, 0.0);
 940                                                                 break;
 941                                                         case dirDOWN:
 942                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0, (pp->PY - 12) / 3.0 * 4.0 - (one_third), (pp->PZ - 16) / 3.0 * 4.0 - (one_third));
 943                                                                 glRotatef(90.0, 0.0, 1.0, 0.0);
 944                                                                 glRotatef(180.0, 0.0, 0.0, 1.0);
 945                                                                 break;
 946                                                 }
 947                                                 break;
 948                                         case dirFAR:
 949                                                 switch (newdir) {
 950                                                         case dirUP:
 951                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0, (pp->PY - 12) / 3.0 * 4.0 + (one_third), (pp->PZ - 16) / 3.0 * 4.0 + (one_third));
 952                                                                 glRotatef(90.0, 0.0, 1.0, 0.0);
 953                                                                 break;
 954                                                         case dirDOWN:
 955                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0, (pp->PY - 12) / 3.0 * 4.0 - (one_third), (pp->PZ - 16) / 3.0 * 4.0 + (one_third));
 956                                                                 glRotatef(90.0, 0.0, 1.0, 0.0);
 957                                                                 glRotatef(180.0, 1.0, 0.0, 0.0);
 958                                                                 break;
 959                                                         case dirLEFT:
 960                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 - (one_third), (pp->PY - 12) / 3.0 * 4.0, (pp->PZ - 16) / 3.0 * 4.0 + (one_third));
 961                                                                 glRotatef(90.0, 1.0, 0.0, 0.0);
 962                                                                 break;
 963                                                         case dirRIGHT:
 964                                                                 glTranslatef((pp->PX - 16) / 3.0 * 4.0 + (one_third), (pp->PY - 12) / 3.0 * 4.0, (pp->PZ - 16) / 3.0 * 4.0 + (one_third));
 965                                                                 glRotatef(270.0, 1.0, 0.0, 0.0);
 966                                                                 glRotatef(180.0, 0.0, 0.0, 1.0);
 967                                                                 break;
 968                                                 }
 969                                                 break;
 970                                 }
 971                                 myElbow(mi, (sysT == 2));
 972                                 break;
 973                 }
 974                 glPopMatrix();
 975         }
 976
 977         OPX = pp->PX;
 978         OPY = pp->PY;
 979         OPZ = pp->PZ;
 980         pp->olddir = pp->nowdir;
 981         pp->nowdir = newdir;
 982         switch (pp->nowdir) {
 983                 case dirUP:
 984                         pp->PY++;
 985                         break;
 986                 case dirDOWN:
 987                         pp->PY--;
 988                         break;
 989                 case dirLEFT:
 990                         pp->PX--;
 991                         break;
 992                 case dirRIGHT:
 993                         pp->PX++;
 994                         break;
 995                 case dirNEAR:
 996                         pp->PZ++;
 997                         break;
 998                 case dirFAR:
 999                         pp->PZ--;
1000                         break;
1001         }
1002         pp->Cells[pp->PX][pp->PY][pp->PZ] = 1;
1003
1004         /* Cells'face pipe */
1005         glTranslatef(((pp->PX + OPX) / 2.0 - 16) / 3.0 * 4.0, ((pp->PY + OPY) / 2.0 - 12) / 3.0 * 4.0, ((pp->PZ + OPZ) / 2.0 - 16) / 3.0 * 4.0);
1006         MakeTube(mi, newdir);
1007
1008         glPopMatrix();
1009
1010         glFlush();
1011
1012     if (mi->fps_p) do_fps (mi);
1013
1014     if (dbuf_p)
1015       glXSwapBuffers(display, window);
1016 }
1017
1018 #ifndef STANDALONE
1019 ENTRYPOINT void
1020 change_pipes (ModeInfo * mi)
1021 {
1022         pipesstruct *pp = &pipes[MI_SCREEN(mi)];
1023
1024         if (!pp->glx_context)
1025                 return;
1026
1027         glXMakeCurrent(MI_DISPLAY(mi), MI_WINDOW(mi), *(pp->glx_context));
1028         pinit(mi, 1);
1029 }
1030 #endif /* !STANDALONE */
1031
1032
1033 ENTRYPOINT void
1034 release_pipes (ModeInfo * mi)
1035 {
1036         if (pipes != NULL) {
1037                 int         screen;
1038
1039                 for (screen = 0; screen < MI_NUM_SCREENS(mi); screen++) {
1040                         pipesstruct *pp = &pipes[screen];
1041
1042                         if (pp->glx_context) {
1043
1044                                 /* Display lists MUST be freed while their glXContext is current. */
1045                                 glXMakeCurrent(MI_DISPLAY(mi), pp->window, *(pp->glx_context));
1046
1047                                 if (pp->valve)
1048                                         glDeleteLists(pp->valve, 1);
1049                                 if (pp->bolts)
1050                                         glDeleteLists(pp->bolts, 1);
1051                                 if (pp->betweenbolts)
1052                                         glDeleteLists(pp->betweenbolts, 1);
1053
1054                                 if (pp->elbowbolts)
1055                                         glDeleteLists(pp->elbowbolts, 1);
1056                                 if (pp->elbowcoins)
1057                                         glDeleteLists(pp->elbowcoins, 1);
1058
1059                                 if (pp->guagehead)
1060                                         glDeleteLists(pp->guagehead, 1);
1061                                 if (pp->guageface)
1062                                         glDeleteLists(pp->guageface, 1);
1063                                 if (pp->guagedial)
1064                                         glDeleteLists(pp->guagedial, 1);
1065                                 if (pp->guageconnector)
1066                                         glDeleteLists(pp->guageconnector, 1);
1067                                 if (pp->teapot)
1068                                         glDeleteLists(pp->teapot, 1);
1069                         }
1070                 }
1071
1072                 (void) free((void *) pipes);
1073                 pipes = NULL;
1074         }
1075         FreeAllGL(mi);
1076 }
1077
1078 XSCREENSAVER_MODULE ("Pipes", pipes)
1079
1080 #endif